docs: simplify axum example

examples/axum_embedded/src/main.rs

@@ -51,22 +51,19 @@ async fn main() -> Result<()> {
     postgresql.stop().await?;
     postgresql.start().await?;
 
-    info!("Enabling extension");
-    let pool = PgPool::connect(database_url.as_str()).await?;
-    enable_extension(&pool).await?;
-
     info!("Setup connection pool");
-    let db_connection_str = settings.url(database_name);
     let pool = PgPoolOptions::new()
         .max_connections(5)
         .acquire_timeout(Duration::from_secs(3))
-        .connect(&db_connection_str)
+        .connect(&database_url)
         .await?;
 
+    info!("Enabling extension");
+    enable_extension(&pool).await?;
+
     info!("Start application");
     let app = Router::new().route("/", get(extensions)).with_state(pool);
 
-    // run it with hyper
     let listener = TcpListener::bind("0.0.0.0:3000").await.unwrap();
     info!("Listening on {}", listener.local_addr()?);
     axum::serve(listener, app).await?;
@@ -91,9 +88,6 @@ async fn extensions(State(pool): State<PgPool>) -> Result<Json<Vec<String>>, (St
         .map_err(internal_error)
 }
 
-fn internal_error<E>(err: E) -> (StatusCode, String)
-where
-    E: std::error::Error,
-{
+fn internal_error<E: std::error::Error>(err: E) -> (StatusCode, String) {
     (StatusCode::INTERNAL_SERVER_ERROR, err.to_string())
 }